Well tubing retrieving apparatus



Feb. 16, 1965 F. L. LE 505. SR

WELL TUBING RETRIEVING APPARATUS 3 Sheets-Sheet 1 Filed March 30, 1962 INVENTOR. FL. 1.6505, 5/."

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ATTORNEY Feb. 16, 1965 F. L. LE BUS. SR

WELL TUBING RETRIEVING APPARATUS 3 Sheets-Sheet 2 Filed March 30, 1962 4 a 8 m m w INVENTOR. FL.Ze5UJ,/? BY A TTQQ/VEY Feb. 16, 1965 F. 1 LE Bus, SR

wsu. TUBING RETRIEVING APPARATUS 5 Sheets-Sheet 3 Filed March 30, 1962 (all IL INVENTOR. Fl. [6 541.5; 5/: BY

United States Patent 3,169,593 WELL TUBING RETRIEVING APPARATUS Franklin L. Le Bus, Sn, Longview, Tex., assignor, by mesne assignments, to Bowen Tools, Inc., a corporation of Texas Filed Mar. 30, 1962, Ser. No. 183,774 8 Claims. (Cl. 175-315) This invention relates to improvements in apparatus for pulling stuck well tubular members from a well bore, and more particularly, but not by Way of limitation, to a combined retrieving and reaming apparatus for dislodging stuck well tubing, packers, and the like, from a well bore. This application is an improvement over my co-pending application Serial No. 17,198 filed March 23, 1960, and entitled Combined Wash-Over and Well Tubing Retriever Apparatus, now Patent No. 3,082,831.

In the production of petroleum products from a well bore, the well tubing may become corroded, or otherwise damaged, and it is often desirable to pull the tubing from the bore for replacement or repair. When the tubing is set in the well bore, a packer is normally disposed therearound in the proximity of the bottom of the bore for packing oil the lower portion of the bore from the upper portion thereof. In the pulling or removal of the Well tubing from the bore, the packing member frequently will fail to collapse for release from the side walls of the bore, and the portion of the well tubing secured thereby may become stuck or lodged in the well bore. In addition, many Wells produce sand along with the well fluid and a sanding may occur between the annular space between the tubing and the casing which may pack to approximately the same hardness or solidarity as sand stone. This sanding usually results in lodging of the tubing in the well bore. It is usually necessary to remove the upper portion or" the tubing from the bore in order that a washover string or reaming apparatus may be utilized in order to loosen the stuck tubing. When the tubing has been dislodged, it is then usually necessary to remove the washover string to install a milling tool to ream over the fish or packer and retrieve the loosened packer with a suitable fishing apparatus. All this requires two or three trips into the well with the fishing string.

The present invention contemplates a novel fishing tool apparatus or tubing joint in combination with a wash-over string whereby the stuck tubing and fish or packer may be reamed or wash-over for freeing and retrieving thereof in one operation. The novel tool comprises cooperating inner and outer splined sleeves adapted to be interposed in the well tubing for disposition therewith in the well bore to provide a releasable joint in the tubing. The novel tubing joint is preferably disposed in the tubing string at a position approximately one hundred feet above the packer and remains in the well bore with the tubing string during the production of the well fluid therethrough. The outer sleeve is carried by a wash-over string which is secured to the tubing above the packer, and a reaming shoe is secured to the lower end of the outer sleeve. The inner sleeve is secured to the lower portion of the tubing, and the connection between the two splined sleeves provides the releasable joint for the tubing string. When it is desired to remove the tubing from the well bore for any reason, and it is found that the tubing and packer are lodged therein, the tubing string may be readily separated at the releasable tubing joint. The inner splined sleeve remains in connection with the lodged portions of the tubing, and the outer splined sleeve is released from engagement therewith.

Upon a downward movement of the upper portion of the tubing string which has been released from the lodged tubing therebelow, the outer sleeve and wash-over pipe 3,159,593 Patented Feb. 16, 1955 may be telescoped over the'lodged tubing and the reaming operation may be started. A continued downward movement combined with a right hand rotation will provide for reaming of the stuck tubing and packer for a dislodging thereof. In addition, the novel tool may be utilized as a jarring apparatus for facilitating release of the stuck fish after the reaming operation. Upon a release of the stuck tubing, the splined bodies may be engaged whereby an upward pull on the tubing string will remove the tubing and packer from the well bore, as is well known.

A packing head is provided in the outer splined sleeve for cooperating with a plurality of packing rings carried by the inner sleeve to preclude leakage of fluid at the releasable joint during the production of the well fluid through the tubing string. The packing head moves downwardly simultaneously with the outer sleeve upon the disengagement of the splined bodies whereby the sealing contact therebetween is released. As the washover string having the outer sleeve secured therein is lowered over the lodged tubing, there will be no packing ofi? of the fluid, thus providing for a wash-down operation of fluid circulation over the lodged or stuck fish and to the reaming shoe for facilitating the reaming operation. In other words, the fluid circulation is changed upon the disengagement of the packing head with the sealing rings carried by the inner body. The wash-over string is sufliciently long that there will be no interference from the packing members during the reaming operation throughout the length or distance of the reaming of the stuck fish.

The novel fishing apparatus may be utilized for retrieving stuck drill collars of a drill string in a similar manner as for the stuck tubing. The tool is particularly designed and constructed for use in relatively deep well bores wherein the cost of the wash-over pipe and splined bodies set in the Well bore with the tubing string is considerably less than the cost of making even one trip out and back into the well bore, in addition to the expense and time saved in the down time of the producing well. The combined fishing and wash-over apparatus is unique in that it is of a simple construction having a minimum number of operating parts, thereby providing for an economical construction without any detriment of the eflieient operation thereof.

It is an important object of this invention to provide a combined fishing and reaming apparatu wherein a releasable joint is provided for the well tubing string for facilitating removal of the upper portion thereof in the event the tubing and packer become lodged in the Well bore.

It is another object of this invention to provide a novel combined wash-over retrieving apparatus and releasable tubing joint for retrieving a tubing and packer lodged in a well bore for subsequent removal thereof from the bore.

A further object of this invention is to provide a novel fishing apparatus for simultaneously dislodging a stuck fish and holding the fish for subsequent removal from the well bore.

A still further object of this invention is to provide a novel combined fishing and reaming apparatus for recovering lodged Well tubing wherein a combined right hand torque and downward vertical movement is maintained on the wash-over string to release the retrieving tool therefrom for independent reaming of the stuck tubing.

Still another object of this invention is to provide a combined fishing and reaming apparatus which may be utilized for jarring the stuck fish to facilitate the release thereof.

It is a still further object of this invention to provide a combined retrieving and wash-over tool for recovering lodged well tubing from a well bore wherein a combined maintained on the wash-over string for removal of thedislodged tubing from the bore.

Another object of this invention is to provide a novel tubing joint for a tubing string adapted for disposition in the well bore with the tubing during the production of fluid from the well bore.

Still another object of this invention is to provide a combined wash-over retrieving tool and releasable tubing joint particularly designed and constructed for precluding leak-age of fluid at the releasable joint.

It is still another object of this invention to provide a combined wash-over retrieving tool and releasable tubing joint wherein the tubing joint is packed off in the engaged position thereof for circulation of fluid through the tool and providing for a change of fluid circulation upon a release of the joint whereby the fluid is circulated around the stuck fish for facilitating the reaming operation.

And a still further object of this invention is to provide a novel combined wash-over retrieving tool and releasable tubing joint which is simple and efiicient in operation and economical and durable in construction.

Other objects and advantages of the invention will be evident from the following detailed description, read in conjunction with the accompanying drawings, which illustrate my invention.

In the drawings:

FIGURE 1 is a broken sectional elevational view of the upper portion of a tubing joint embodying the invention.

FIGURE 1A is a broken view similar to FIG. 1 of the lower portion of the tubing joint interposed in a tubing string.

FIGURE 2 is a broken sectional elevational view of the upper portion of the tubing joint in another position from that shown in FIG. 1.

FIGURE 2A is a view similar to FIG. 2 of the central portion of the tubing joint.

FIGURE 2B is a view similar to FIG. 2 of the lower portion of the tubing joint interposed in a tubing string.

FIGURE 3 is a broken sectional elevational view of the upper portion of the tubing joint.

FIGURE 3A is a view similar to FIG. 3 of the central portion of the tubing joint with multiple positions thereof depicted in dotted lines.

FIGURE 3B is a view similar to FIG. 3 depicting the lower portion of the tubing joint interposed in a tubing string.

FIGURE 4 is an enlarged sectional view taken on line 4-4 of FIG. 1A.

FIGURE 5 is an enlarged sectional view taken on line 55 of FIG. 1A.

FIGURE 6 is a sectional view taken on line 6-6 of FIG. 5.

Referring to the drawings in detail, reference character 10 generally indicates a retrieving or tubing pulling apparatus comprising an outer sleeve 12 telescopically arranged with an inner body or sleeve 14. The inner body 14 is threadedly secured at the lower end thereof to a tubing collar 16 for securing the sleeve 14 to a tubing string 18. The sleeve 14 is preferably interposed in the string 18 approximately one hundred feet above an external tubing packer 20 (FIGS. 2B and 3B) for a purpose as will be hereinafter set forth, and remains in the well bore (not shown) therewith during the production of the well fluid (not shown).

The outer sleeve 12 is provided with a threaded portion 22 at the lower end thereof for receiving a landing nipple 24. The nipple 24 is provided with a lower threaded portion 26 for receiving a suitable reaming shoe 28 (FIG. 1A). A plurality of circumferentially spaced male lug members 39 are provided on the inner periphery of the nipple 24 for cooperation with the inner body 14 as will be hereinafter set forth. The upper end of the sleeve 12 is threadedly secured at 32 to a packing head sleeve 34, and the packing head 34 is provided with a threaded box connection 36 at the upper end thereof for receiving a wash-over pipe section or sleeve 37 having an upper sub member 38 secured thereto for connection with the upper tubing string 40. In this manner, the sleeve 12 is secured to the tubing string 40 and remains in the well bore therewith during the production of the well fluid. It will be apparent that the upper sub member 38 may be directly secured to the packing head 34, if desired, during the period of time when the apparatus 16 is disposed within the well bore as an integral part of the well tubing, and the wash-over pipe or sleeve 37 may be interposed between the sub 33 and the packing head 34 prior to the wash-over operation, as will be hereinafter set forth.

The packing head 34 is provided with a central bore 42 of a smaller diameter than the central bore 44 of the sleeve 12 for receiving an elongated packing stem menl= her .6. The packing stem is secured to an upwardly extending reduced neck portion 47 provided on the upper end of the inner body 14. A plurality of longitudinally spaced annular grooves 48 are provided on the outer periphery of the packing stem 46 and are preferably of a substantially dove-tail cross sectional configuration for receiving suitable sealing ring or gasket members 50 therein. The sealing members 50 are in a sealing engagement with the inner bore 42 of the packing head 34 to preclude leakage of fluid between the inner body 14 and outer sleeve 12, thus providing an eflicient tubing joint for the tubing string during the production of well fluid therethrough.

It is important that the length of the reaming shoe 28 be at least the length of the fish or stuck packer 20 to be washed over and retrieved. This length may vary, of course, but the average packer to be washed over is usually four or five feet in length, and as a consequence, the reaming shoe 28 should preferably be approximately five and one-half feet long. The portion of the neck or tubing 47 between the lines XX and YY preferably should be approximately one hundred twenty feet long so that the bore 42 of the packing head 34 will never engage or interfere with the inner splined body 14 during the reaming operation. It is equally important that the packing head 34 be of a length at least equalling the distance between the point A and the point B (FIG. 1A) of the inner body 14 for a purpose as will be hereinafter set forth in detail. Furthermore, the wash-over pipe 37 should be approximately one hundred and forty feet long above the packing head 34 in order that the head or sub 33 will not contact the packing stem 46 prior to the dislodging of the stuck packer 20.

The inner body 14 is provided with a plurality of circumferentially spaced longitudinally extending female grooves or splines 52 below the neck portion 47, each having an upper end 54 thereof open to receive one of the lugs 30 therein. A tapered or helical shoulder 56 is provided in communication with the open end 54 of each of the grooves 52 for facilitating the disposition of the lugs 30 therein, as is well known. Each of the grooves 52 extends into communication with a substantially horizontally disposed groove 58 which in turn communicates with a longitudinal groove 60 having the upper end thereof closed by a shoulder 62. A tapered shoulder 64 is provided at the upper edge of each of the grooves 58 and extends between the groove 52 and the groove 60 for guiding the movement of the lugs 30 therebetween, as is well known. The sets of grooves 52, 58 and 60 cooperate to provide female J-slots for the inner body 14. Each of the closed grooves 60 extends downwardly into communication with a lower horizontal groove 65 which is provided with a lower pocket portion 66. In addition, the grooves 6t extend downwardly below the horizontal grooves 65 into a flared groove portion 68 having the lower end 70 thereof open.

At least one of the horizontal grooves 65 is provided with aspring urged latch member '72. It is preferable to provide each of the grooves 65 with a latch 72, as shown in FIG. 5, but not limited thereto. The latch 72 is disposed in a recess portion 74 provided in the body 14, and is retained therein by a plurality of keeper screws 76. The latch 72 is constantly urged radially outward by a plurality of springs 78 having one end anchored in the recess 74 and the opposite end anchored in a pocket portion 8!) provided in the latch 72. The latch 72 is normally in an extended or outwardly extending position for blocking the entrance or exit of the horizontal passageway 65 for a purpose as will be hereinafter set forth.

A centrally disposed longitudinally extending bore 82 is provided in the inner body 14 for a fluid passageway therethrough. It will be apparent that a horizontal shoulder 84 closes the lower end of each of the grooves 52 and forms the lower edge of the horizontal grooves 58. In addition, a horizontal shoulder 86 is provided at the upper edge of the second or lower horizontal groove 65 for a purpose as will be hereinafter set forth.

Operation The novel combined retrieving and reaming apparatus 10 may be interposed in a tubing string by securing the sub member 38 to the upper portion 40 thereof and similarly securing the inner body 14 to the lower portion 18 thereof, as hereinbefore set forth. It is preferable to interpose the tool 10 in the tubing string approximately one hundred feet above the tubing packer 20. Prior to lowering the tubing string into the well bore, the outer sleeve 12 may be telescoped over the inner body 14 whereby the landing nipple 24 moves over the female splines on the body 14. Thus, the male lugs 30 will be directed into the grooves 52 to provide an engagement between the outer sleeve 12 and the inner body 14. A continued lowering or movement of the nipple 24 over the body 14 with a combined right hand rotation thereof will move the lugs through the horizontal grooves 58 and into the longitudinal grooves 60. It is then preferable to rotate the nipple 24 in a left hand direction with sufiicient pressure to overcome the force of the springs 7 3 whereby the latches 72 will be depressed for permitting the lugs 30 to move into the horizontal grooves 65. A continued downward movement of the nipple 24 will position the lugs 30 in the lower pockets 66, as shown in FIG. 1A. The force of the springs 78 will cause the latches 72 to snap back into the normal outwardly extending position for resisting any movement of the lugs 30 from the latched position within the grooves 65. The tool 10 is thus in a latched position, and may be lowered along with the tubing to be set in the well bore (not shown) in the usual manner for production of the well fluid through the tubing string, as is well known. The packing head 34 cooperates with the sealing members 50 to efficiently pack off the unit or tool 10 to preclude leakage of fluid, thus providing an efiicient tubing joint for the tubing string.

When the tubing has become lodged within the well bore for any reason, the upper portion of the tubing may be released from engagement with the stuck lower portion thereof. In order to disengage the upper portion of the tubing from the lodged tubing and packer, the tool 10 may be unlatched whereby the upper sleeve 12 and wash-over pipe 37 will be disengaged from the stuck fish along with the upper portions of the tubing, and the inner body 14 with the tubing or neck 47 and packing stem 46 will remain in connection with the lodged portions of the tubing.

The unlatching of the tool 10 may be readily accomplished by raising the tubing string suificiently for moving the lugs 30 upwardly into position against the shoulders 86 of the horizontal grooves 65. A right hand rotation of the tubing will move the lugs 30 against the latches 72 with sufficient pressure for depressing the latches whereby the lugs may be moved into the grooves 60, particularly since the inner body 14 is held against rotation due to the connection thereof with the stuck tubing 18 and packer 20. A downward movement of the tubing 14 will move the lugs 30 downwardly through the grooves 60 and out the open end 70 thereof, thus releasing the engagement between the splined bodies 12 and 14.

A continued downward movement of the tubing 40 combined with a right hand rotation thereof will move the Wash-over pipe 37, outer sleeve 12 and the reaming shoe 28 downwardly over the lodged tubing and packer for a reaming thereof. As the sleeve 12 moves downwardly out of engagement with the inner body 14, the packing head 34 simultaneously moves downwardly out of engagement with the packing rings 50 of the packing stem 46. At this point, the fluid circulation is changed whereby the fluid washes downwardly over the lodged tubing and to the reaming shoe 28 for facilitating the reaming operation. The reaming operation may be continued as desired for dislodging of the tubing and packer. It is to be noted, however, that the packing head 34 is at least as long as the distance between the points A and B (FIG. 1A) as hereinbefore set forth, to assure a packing off of the well fluid throughout the length of the engagement between the splined bodies 12 and 14.

As a practical matter, most operators of this type of equipment have learned from experience approximately how much sanding, if any, has occurred, and in some circumstances there will be less distance to wash-over than in other circumstances. The length of the washover pipe 37 and tubing 47 may be varied accordingly. However, the lengths set forth herein are generally considered to be preferable. As hereinbefore noted, it is important that the length of the neck 47 between the lines XX and Y-Y be approximately one hundred twenty feet long in order to provide suflicient clearance between the packing head 34 and the inner spline body 14. Thus, the reduced diameter of the bore 42 will not engage the body 14 prior to a completion of the dislodging or reaming of the packer. Furthermore, it is important that the length of the Wash-over sections 37 above the packing head 34 be approximately one hundred forty feet long to provide clearance between the sub member 38 and the packing stem 46 during the reaming operation. In addition, the reaming shoe 28 is sufliciently longer than the packer 2G to preclude interference between the landing nipple 24 and the packer 20 prior to the dislodging thereof.

When the operator of the tool 10 has ascertained that sufiicient reaming has taken place for removing or releasing the stuck fish, or packer and tubing, the tubing string with the wash-over sections interposed therein is vertically raised within the bore whereby the lugs 30 are brought into the flared grooves 68. It will be apparent that the flared or tapered shoulders or sides of the grooves 68 will facilitate the guiding of the lugs into the grooves 69. A continued upward pull on the wash-over string combined with a right hand torque will move the lugs upwardly in the grooves 60 until the lugs are brought into engagement with the upper shoulder 62 thereof as shown in solid lines in FIG. 3A. The right hand torque is preferably applied to the tubing string to assure that the lugs 30 will not enter either of the horizontal grooves 65 or 58 during the upward movement of the pipe. With the lugs 30 in position against the shoulder 62, a continued upward pull on the wash-over pipe or tubing string will raise the inner body 14 and the dislodged fish or tubing connected thereto for retrieving of the tubing 18 and the packer 20.

The lodged tubing and packer may not be completely loosened by the reaming operation, and if desired, the apparatus or tool 10 may be utilized as a jarring tool to assist in the loosening of the tubing. After the reaming operation, and with the lugs 36 in the upper position in the grooves 60 against the shoulder 62, the wash-over string may be vertically reciprocated while maintaining 7 a right hand torque. The lugs and shoulder 62 will cooperate to provide a jarring action for facilitating the dislodging or freeing of the tubing.

It is to be understood that the novel retrieving and reaming apparatus may be utilized for recovering stuck drill collars, and the like, from a well bore, and is not limited to retrieving stuck tubing. However, in utilizing the tool for retrieving stuck drill collars, the lugs would be of a heavier and stronger construction than required for recovering stuck tubing. Furthermore, in the event the stuck fish is reamed free and begins to drop toward the bottom of the well bore, the lugs 30 will re-enter the grooves 60 and will engage the upper shoulder 62 thereof for precluding 'a loss ofthe fish. Tubing is normally positioned in the proximity of the bottom of the bore, and thus, the falling thereof is not as great a problem as in the case of drill collars.

I From the foregoing, it will be apparent that the present invention provides a combined reamer and retrieving tool wherein a stuck fish may be dislodged from a well bore and retrieved therefrom in one operation. The novel tool is so designed and constructed to be interposed in the well tubing string during the production of fluid from the well bore, and provides a releasable joint for the tubing in the event the tubing becomes stuck for any reason. The releasable tubing joint may be readily unlatched whereby the upper sleeve thereof may be telescoped over the lower sleeve for reaming and dislodging of the stuck fish. Th novel tool provides an efficient packing off of the well fluid at the releasable tubing joint during the fluid production through the tubing string, and functions to change the point of fluid circulation during the reaming operation for providing an efficient wash-over and reaming of the stuck fish. The novel tool is simple and efficient in operation and economical and durable in construction.

Changes may be made in the combination and arrangement of parts as heretofore set forth in the specification and shown in the drawings, it being understood that any modification in the precise embodiment of the invention may be made within the scope of the following claims without departing from the spirit of the invention.

I claim:

1. In combination with a tubing string, a combined wash-over and retrieving tool adapted to be interposed in the tubing string, said retrieving tool comprising an outer sleeve secured to the upper portion of the tubing string and telescopically arranged with an inner sleeve secured to the lower portion of the tubing string, spline means cooperating between the outer sleeve and inner sleeve to provide a locking engagement therebetween, latching means provided on the inner sleeve for precluding an accidental disengagement of the outer sleeve therefrom in the locked position therebetween, means cooperating between the inner and outer sleeve to preclude leakage of fluid therebetween, said spline means responsive to a combined upward movement and rotational movement of the tubing string to provide for an unlatching of the outer sleeve from the inner sleeve whereby the upper portion of the tubing may be separated from the stuck lower portion thereof, said splinemeans responsive to a subsequent downward movement combined with a right hand torque on the upper portion of the tubing string for providing a telescopic movement of the outer sleeve over the stuck portion of the tubing, and means provided on the outer sleeve for reaming the stuck portion for a freeing thereof.

2. In combination with a tubing string, an unlatching joint adapted to be interposed in the tubing string for facilitating the recovery of tubing lodged in a packer in a well bore, said unlatching joint comprising an inner body secured to the stuck portion of the tubing, an outer sleeve secured to the upper portion of the tubing and telescopically arranged with the inner body, spline means cooperating between the inner body and outer sleeve to provide a latching engagement therebetween, means co- 8 operating between the inner body and outer body to preelude leakage of fluid therebetween in the engaged posi-' tion therebetween, said spline means responsive to a combined upward and rotational movement of the upper portion of the tubing string relative to said inner body for a separation of the outer sleeve from the inner body, said spline means responsive to a subsequent downward and combined right hand rotational movement of the tubing string for telescoping the outer sleeve over the inner body and out of engagement therewith, means pro vided on the outer sleeve for reaming the stuck tubing and packer for a freeing thereof, and said spline means responsive to a combined vertical upward and rotational movement for removing the reamed tubing and packer simultaneously with the upper portion of the tubing string and unlatching joint.

3. In combination with a tubing string, a retrieving tool for recovering tubing lodged in a packer in a well bore, said retrieving tool comprising an inner sleeve secured to the lodged tubing, an outer sleeve secured to the upper portion of the tubing and telescopically arranged with the inner sleeve, means cooperating between the inner and outer sleeves to provide for alternately latching and unlatching engagement therebetween, packing means provided on the retrieving tool to preclude leakage of fluid in the latched engagement between the inner and outer sleeves, said packing means providing for a wash-over circulation of the fluid in the unlatched engagement between the inner and outer sleeves, and means provided on the outer sleeve for reaming the lodged tubing for a subsequent removal thereof simultaneously with the upper portion of the tubing string and the retrieving tool.

4. In combination with a tubing string, a retrieving tool for recovering tubing lodged in a packer in a well bore, said retrieving tool comprising an inner sleeve secured to the lodged tubing, an outer sleeve secured to the upper portion of the tubing and telescopically arranged with the inner sleeve, spline means cooperating between the inner and outer sleeves to provide for alternate latching and unlatching engagement therebetween, a packing head carried by the outer sleeve, a packing stem carried by the inner sleeve and telescopically arranged with the packing head, a plurality of sealing members provided on the packing stem for cooperation with the packing head to provide a packing olf of the retrieving tool in the latched engagement between the outer and inner sleeves, said packing head out of sealing engagement with the packing stem in the unlatched engagement between the inner and outer sleeves to provide for a wash-over of the lodged tubing, and means provided on the outer sleeve for reaming the lodged tubing for a subsequent removal thereof simultaneously with the upper portion of the tubing string and the retrieving tool.

5. In combination with a tubing string, a retrieving tool for recovering tubing lodged in a packer in a well bore, said retrieving tool comprising an inner body secured to the lodged tubing, an outer sleeve secured to the upper portion of the tubing and telescopically arranged with the inner body, spline means cooperating between the sleeve and body in one position therebetween to provide a locking engagement for disposition of the retrieving tool in a well bore with the tubing string, a packing head carried by the outer sleeve, a packing stem carried by the body and telescopically arranged with the packing head, a plurality of sealing members provided on the packing stem for cooperation with the packing head to preclude leakage of fluid in the locked position between the sleeve and body, said spline means cooperating between the sleeve and body upon a combined vertical movement and rotational movement of the sleeve to provide a disengagement of the sleeve and body for in dependent movement of the sleeve, means provided on the outer sleeve for reaming the lodged tubing for a subsequent removal thereof simultaneously with the upper portion of the tubing string and the retrieving tool, and said packing head disengaged from said packing stem in the disengaged position between the sleeve and body to provide for a wash-over circulation of the fluid during the reaming operation.

6. In combination with a tubing string, a combined unlatching joint and wash-over tool adapted to be interposed in the tubing string for facilitating recovery of lodged tubing, said tool comprising an outer sleeve telescopically arranged with an inner sleeve, means cooperating between the inner and outer sleeves to provide alternate latching and unlatching of the tool, packing means cooperating between the inner and outer sleeves to provide a packing oil of the tool in the latched position thereof, and reaming means provided on the tool for reaming of the lodged tubing, and said packing means providing for a washing over operation during the reaming of the lodged tubing.

7. In combination with a tubing string, a combined unlatching joint and wash-over tool adapted to be interposed in the tubing string for facilitating recovery of lodged tubing, said tool comprising an outer sleeve telescopically arranged with an inner sleeve, means cooperating between the inner and outer sleeves to provide alternate latching and unlatching engagement therebetween, packing means cooperating between the inner and outer sleeves to preclude leakage of fluid in the latched engagement therebetween, said packing means providing for a wash'over fluid circulation in the unlatched position be tween the inner and outer sleeves for facilitating dislodging of the lodged tubing, and means provided on the outer sleeve for a subsequent reaming of the lodged tubing for a freeing thereof.

8. In combination with a tubing string disposed in a well bore for the production of fluid therethorugh, a retrieving tool for recovering stuck tubing comprising a pair of telescopic members, means for interposing the telescopic members in the tubing string, spline means provided on the telescopic members and cooperating to provide alternate unlatched and latched positions therebetween, means provided on one of said telescopic members and cooperating with the other of said telescopic members for precluding leakage of fluid therebetween in the latched position thereof, said spline means responsive to a combined upward and rotational movement of the upper portion of the tubing string for an unlatching of the telescopic members whereby the upper portion of the tubing string may be separated from the stuck lower portion thereof, said spline means responsive to a subsequent combined downward movement and right hand torque of the separated upper portion of the tubing for telescopic movement of the unlatched upper portion of the tool over the stuck portion of the tubing, and means provided on the tool for reaming the stuck portion of the'tubing for a subsequent removal thereof with the upper portion of the tubing and the retrieving tool.

References Cited by the Examiner UNITED STATES PATENTS 2,804,151 8/57 Le Bus 175262 3,003,561 10/61 Le Bus et a1 l75262 X 3,070,170 12/62 Le Bus et a1 l75262 X 3,082,831 3/63 Le Bus l75315 CHARLES E. OCONNELL, Primary Examiner. 

1. IN COMBINATION WITH A TUBING STRING, A COMBINED WASH-OVER RETRIEVING TOOL ADAPTED TO INTERPOSED IN THE TUBING STRING, SAID RETRIEVING TOOL COMPRISING AN OUTER SLEEVE SECURED TO THE UPPER PORTION OF THE TUBING STRING AND TELESCOPICALLY ARRANGED WITH AN INNER SLEEVE SECURED TO THE LOWER PORTION OF THE TUBING STRING, SPLINE MEANS COOPERATING BETWEEN THE OUTER SLEEVE AND INNER SLEEVE TO PROVIDE A LOCKING ENGAGEMENT THEREBETWEEN, LATCHING MEANS PROVIDED ON THE INNER SLEEVE FOR PRECLUDING AN ACCIDENTAL DISENGAGEMENT OF THE OUTER SLEEVE THEREFROM IN THE LOCKED POSITION THEREBETWEEN, MEANS COOPERATING BETWEEN THE INNER AND OUTER SLEEVE TO PRECLUDE LEAKAGE OF FLUID THEREBETWEEN, SAID SPLINE MEANS RESPONSIVE TO A COMBINED UPWARD MOVEMENT AND ROTATIONAL MOVEMENT OF THE TUBING STRING TO PROVIDE FOR AN UNLATCHING OF THE OUTER SLEEVE FROM THE INNER SLEEVE WHEREBY THE UPPER PORTION OF THE TUBING MAY BE SEPARATED FROM THE STUCK LOWER PORTION THEREOF, SAID SPLINE MEANS RESPONSIVE TO A SUBSEQUENT DOWNWARD MOVEMENT COMBINED WITH A RIGHT HAND TORQUE ON THE UPPER PORTION OF THE TUBING STRING FOR PROVIDING A TELESCOPIC MOVEMENT OF THE OUTER SLEEVE OVER THE STUCK PORTION OF THE TUBING, AND MEANS PROVIDED ON THE OUTER SLEEVE FOR REAMING THE STUCK PORTION FOR A FREEING THEREOF. 